We are currently starting the interior construction of our new home in Fuzhou, China, and I'm trying to build a home project studio into the second floor. It is technically a loft apartment in a high-rise building, so each unit gets two floors--ours is floor 7 and 8. AFAIK, other than directly upstairs from the studio (which is floor 9's kitchen area), I have no other neighbors to worry about. The real estate companies in China do not do full interior construction when they sell units because people in China commonly want to do their own interior construction--that's why our place is so bare, with no interior walls at all.
have to combine them.

Here's a photo with measurements of how it looks right now:

The orange color is the dimensions of the room (as how I'd like to have it once the walls are put up). The green color is the misc measurements of all the uneven parts (support beams, storage)the real estate company had built into the apartment. The purple color is where I'd put up a wall and door to the studio.

The window and the glass door are a concern, and I'll most likely just build hinged soundproof covers to close them up when I need to--probably wood panels with glassfiber insulation in the middle, and then put broadband acoustic panels on them.

The real estate company had built a small storage area into the room. I'll probably build a wooden frame around the opening and use a hinged broadband acoustic panel as its door, and let he storage area double as a bass trap.

The construction company the real estate company hired used hollow bricks like shown in this circular cutaway (it's a standard cut made in all houses to accomodate a hanging wall HVAC unit).

Thanks for posting those. I know every country has different construction techniques, it nice to see one.

Why did they leave a pile of sand and stones? Do they expect people to mix their own concrete to build more walls? Looks like a shower area there but you dont need stones for holding down ceramic tiles.

If you dont mind me asking, how much do they charge for an unfinished unit like that.